Flat varnish



Patented July 12,- 1932 I No Drawing.

PATENT o FFICE- cum mvnv spasm, or omcaeo, rumors rum vanmsn Application filed June a,"

My invention relates to varnishes and particularly to a novel flat varnish having unusual properties. I 1 While there are a number of flat varnishes on the market that lend themselves to different applications, none thereof possess the novel and usefulproperties of the one hereafter described in detail.

Upon the inspection of a surface that has been coated with an ordinary flat varnish with a microscope, one will note any number of tiny pores and pinholes, demonstrating 7 that these varnishes cover the surfaces something like a microscopic net-work. There is no continuous film set up and for this reason the surface assumes an apparent flat surface which differs radically from the ordinary glossy varnish. .The varnish composition that I have invented, while it contains a numberof ingredients that are common to all flat varnishes. yet the properties of these ingredients and the process of combination gives my varnish roperties that differ I from the usual fiat varnish, viz., it acts simultaneously as a glazing liquid. My varnish can be used in its transparent state. orit may be opacifiedbv the addition of pigment. In either event, it resents such highly desirable properties as drying in from one to three hours; is absolutelv non-sagable; dries to a flat velvety finish. lending a starch-like effect to the coated surface: thesurface is washable within fortv-eighthours after application; can be applied to wood, metal. plaster or wallboard surfaces-with the pleasing and advantageous results. which can be enhanced to a degree by the skill of the artisan-making the application, Thus while there are quite va number of so-called' glazing liquids on the market. none are satisfactory for the reason that thev lack one or more of the advantages exhibited by mine. such as their slower drying time, heir relatively pervious surface, and other points that are well known to the using trade. My particular invention is the only glazing liquid that reacts perfectly to all the exact- "ing requirements for this particular type of material. As an instance of its efliciency. should an excess be brushed on the surface,

1929. Serial no. 368,192. g the excess may be rubbed ofi with a rag to the desired quantity, leaving the resulting job altogether satisfactory.

The solid base of my product consists in a solid fatty acid salt of one of the heavier metals like calcium, barium, magnesium, or aluminum stearate, palmitate, etc. In other words, I use any hard salt of a heavy metal and a fatty acid, and for pur eses of tinting thisrbase product, I utilize t e copper, iron, and other solid fatty acid' salts that lend collar.

s pigment material for o aci in the product, I'use chalk, barium ca i'bon te,- inagnesium carbonate, gypsum, etc., while as color pigment materials I use ochre, ultramarine blue, etc. I 4

The liquid base of my product consists in refined linseed oil, oriany other drying oil that will serve this end, such as Gh inawood oil, perilla oil etc. This oil may be used in combination with a dryer, or the dryer may be subsequently added. In combination with this drying oil I use small portions of hard fusible resinous materials, such as commercial rosin, cumar etc. v

The product is diluted withmineral oil of the kerosene fraction, and is thinned with naphthas of various gravities. depending upon the particular usage,'or witha combination of high and low flash naphthas.

The total solid content of my material ranges between 'and The total drying oil content of my product also ranges between 15 and 30%, but the total solid and oil composition of my product taken together never exceeds. of the finished product. The balance of the product consists in from 33% to 40% of a kerosene oil of about 40 B6 which is very essential, and the remaining 10 to 15% of a mixture of highjand low flash naphtha. p

The compounding of my varnish may be accomplished in a number of ways, such as by the direct solution of the solid matter in the linseed oil, with or without a small amount of Ghinawood oil, to which is then added the mineral oil, and finally the thinners. It can also be preparedby using varthinning and diluting the same. As an example of the preparation of a representative 'batch,Idissolve about 100poundsof aluminum stearate in 60 pounds of refined linseedoil, with which I mix 50 pounds of magnesium carbonate. To this mixture, I then add about 10 pounds of a varnish consisting of rosin dissolved in wood oil and diluted with a thinner and 80 pounds of a varnish consisting of rosin dissolved in linseed oil and thinned with high flash naphtha. To this mixture I add about 175 pounds of mineral oil of 40 B., and from 5 to pounds of japan dryer depending upon the particular use intended. Another example is as follows: 2 to 5% of a solid salt of ,a fatty acid and a heavy metal, such as aluminum stearate, to of a pigment and filler such as magnesium carbonate, 5% of a hard fusible rosin, 25 to 50% of 40 B. kerosene, together with the necessary thinner and dryer.

The aforesaid, I believe thoroughly illustrates the principles and technique involved in myinvention, and wish it to be considered as such.

I claim A composition of matter that will form-a glazed surface composed of 15 to 30% by I weight of drying oils, 15 to 30% solids, comprising metallic soaps' of fatty acids pigments, the quantity of solids and drying oils not to exceed of the total ingredients, the balance of the composition of matter, being not less than 50% of'the total weight, consisting of from 33 to 40% of a kerosene oil of about 40 B., and the remaining 16% to 10% consisting of a mixture of high and low boiling naphtha.

In testimony whereof have aflixed mysignature. A

GLEN HARVEY BURGMAN. 

